Perovskite solar cells with a DMSO-treated PEDOT:PSS hole transport layer exhibit higher photovoltaic performance and enhanced durability

Di Huang, Tenghooi Goh, Jaemin Kong, Yifan Zheng, Suling Zhao, Zheng Xu, André D. Taylor

Research output: Contribution to journalArticle

Abstract

Despite being the most commonly used hole transport layer for p-i-n perovskite solar cells, the conventional PEDOT:PSS layer is far from being optimal for the best photovoltaic performance. Herein, we demonstrate highly conductive thin DMSO-doped PEDOT:PSS layers which significantly enhance the light harvesting, charge extraction, and photocurrent production of organo-lead iodide devices. Both imaging and X-ray analysis reveal that the perovskite thin films grown on DMSO-doped PEDOT:PSS exhibit larger grains with increased crystallinity. Altogether, these improvements result in a 37% boost in the power conversion efficiency (PCE) compared to standard p-i-n photovoltaics with pristine PEDOT:PSS. Furthermore, we demonstrate that DMSO-doped PEDOT:PSS devices possess enhanced PCE durability over time which we attribute primarily to fill factor stability.

Original languageEnglish (US)
Pages (from-to)4236-4243
Number of pages8
JournalNanoscale
Volume9
Issue number12
DOIs
StatePublished - Mar 28 2017

ASJC Scopus subject areas

  • Materials Science(all)

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